There are two articles on yesterday's thread. "Galaxy clusters consist of thousands of galaxies gravitationally bound into huge structures," said Joseph Mohr, a professor of astronomy at the University of Illinois. "Because of the expansion of the universe, the clusters appear denser at larger redshifts, when the universe was younger and denser."

and from the other article . . .

Inside a gravastar, space-time would be "totally warped," the researchers say. Further, the inner space would exert an outward force, which would enhance the durability of the bubble

and . . .

Mottola and Mazur have taken their extreme idea to a mentally dizzying new level: The say our entire universe may be the interior of a giant gravastar.

For some reason these two articles together got my brain lobes flapping.

Lot of information there to absorb, but real interesting. If the universe is inside a gravastar, what's outside the gravastar? Is that sitting in a universe of its own? Some of these theories may not be as extreme as they sound. I think anything's possible.